feat(interactive): Automatically generate configuration yaml for stored procedure.

[zhanglei1949]

Stored procedure is an important component in Graphscope Interactive. Previously, we needed users to manually write the input and output formats in YAML files. However, this file should actually be automatically generated.

[zhanglei1949]

For example, for the following c++ procedure,

#include "flex/engines/hqps_db/app/interactive_app_base.h"
#include "flex/engines/hqps_db/core/sync_engine.h"
#include "flex/utils/app_utils.h"

namespace gs {
class ExampleQuery : public CypherReadAppBase<int32_t> {
 public:
  using Engine = SyncEngine<gs::MutableCSRInterface>;
  using label_id_t = typename gs::MutableCSRInterface::label_id_t;
  using vertex_id_t = typename gs::MutableCSRInterface::vertex_id_t;
  ExampleQuery() {}
  // Query function for query class
  results::CollectiveResults Query(const gs::GraphDBSession& sess,
                                   int32_t param1) override {
    LOG(INFO) << "param1: " << param1;
    gs::MutableCSRInterface graph(sess);
    auto ctx0 = Engine::template ScanVertex<gs::AppendOpt::Persist>(
        graph, 0, Filter<TruePredicate>());

    auto ctx1 = Engine::Project<PROJ_TO_NEW>(
        graph, std::move(ctx0),
        std::tuple{gs::make_mapper_with_variable<INPUT_COL_ID(0)>(
            gs::PropertySelector<int64_t>("id"))});
    auto ctx2 = Engine::Limit(std::move(ctx1), 0, 5);
    auto res = Engine::Sink(graph, ctx2, std::array<int32_t, 1>{0});
    LOG(INFO) << "res: " << res.DebugString();
    return res;
  }
};
}  // namespace gs

extern "C" {
void* CreateApp(gs::GraphDBSession& db) {
  gs::ExampleQuery* app = new gs::ExampleQuery();
  return static_cast<void*>(app);
}

void DeleteApp(void* app) {
  gs::ExampleQuery* casted = static_cast<gs::ExampleQuery*>(app);
  delete casted;
}
}

We should be able to generate the following yaml containing the metadata of the procedure

name: count_vertex_num
description: A stored procedure that does something else
library: /tmp/temp_workspace/data/modern_graph/plugins/libsample_app.so
type: cpp
params:
  - name: var1
  - type: {primitive_type: DT_SIGNED_INT64}
returns:
  - name: res
    type: {primitive_type: DT_SIGNED_INT64}

[jieefeng]

Hi.Can I do it in java?

[zhanglei1949]

Sure, you can do it in Java or Python.